Telephone-receiver shell.



P. '0'. RIOHBY. TELEPHONE RECEIVER SHELL.

APPLIOATION FILED 5159127, 1909.

Patented July 30,1912.

ting

. unrr DsTATEs- PATENr FRANCIS 0. money, or YELYRIA, onro, Assron'on TO THE nnAn ELECTRIC comranr, I

or ELYRIA, OHIO, A CORPORATION or OHIO.

- TELEPHONE-RECEIVER SHELL.

To all whom it may co warn:

Be it known that I, FRANCIS O. RICHEY, a citizen of the United States, residing at Elyria, inthe county of Lorain and State of Ohio, have invented certain new and useful Improvements in Telephone-Receiver Shells; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to telephone receivers, and has for its object the construction of a receiver shell ofmetal which shall accomplish all the purposes heretofore secured in connection with shells for such instruments. and having the additional advantages of lightness, durability, improved appearanceand cheapness.

Receiver shells have commonly been made heretofore of insulating material of one form or another which, generally speaking, 1s very brittle 1n nature and therefore easily broken. To avoid this difliculty, the shells have usually been constructed of considerable thickness with the result that they are both clumsy and heavy. By my invention I construct these shclls of thin sheet metal, folding them over at the edges where the parts are to be joined, causing the folded portions to cohere with the main portions and cutting threads in the double thickness of material thus furnished.

If preferred, a cap of insulating material may be. used in connection with the metal shel instead of the metallic cap which is refe red to.

In constructing my improved receiver shell, I make use preferably of forming dies to form suitable sheet metal into the desired conformation. In order to be readily manipulated so as to assume the form required,

the sheet metal used must be preferably relatively thin. This thin material, howeverfis not adapted to be threaded, since the threads would be so fine necessarily as to be of no use. Furthermore, the threaded portion would not possess sutlicient ngidity to readily. engage the cooperating threaded member. By my invention I eliminate this difficulty by folding the metal over and cutthe. threads in the portion rendered doubly thick this way. The threads may be cut through one portion into the other without danger of the spiral part left in the Patented July 3t), 1912.

Application filed September 27, 1909. Serial No. 519,793.

the threads are cut. I realize the advantage of lightness by this expedient, for, if the material were made thick enough to hold the threads, the shell resulting therefrom would be so heavy as to practically prohibit its use.

A further advantage secured by my improved construction is to be found in the case in which the main portion or both the shell proper and the cap are formed, for the sake of cheapness, of thin sheet metal.

In, connection with the use of sheet steel for forming the main portion of the shell proper and the cap, I employ a protecting varnish or coating, as for example, enamel or japan, to thoroughly protect the steelfrom the contact of moisture.

' My invention will be best understood by reference to the following description when taken in connection with the accompanying illustration showing one specific. embodiment thereof, while its scope will be more particularly pointed out in the appended claims.

In the drawing, Figure l is an elevation of the cap and a fragment of the body portion, each cut away to show the threads in section. Fig. 2 shows the same View with the cap united to the body portion.

Referring to the drawing and to the-embodiment of my invention shown therein, at 1 I illustrate the ear end of the body portion carrying a shoulder 7 The metal of the shell is folded over at this shoulder as shown at 4. The folded portion is fastened to the main part by a cementing material or by compression, or other means, which will cause the contacting surfaces of the body and fold to stick together. .I then cut threads 3 on the threaded portion. These threads may extend through the sheet metal of the fold into that of the body. The metal of the body portion or of the lower fold, as the case may be, furnishes aback;

portions under or over, as I shall see fit, and cutting the threads'on the inside or outside, as may be most expedient. It will also be obvious to those skilled in the art, that numerous and extensive departures from the form and the details of the apparatus herein shown may be made'without departing from the spirit of this invention, the same being here shown solely for the purpose of. clearly illustrating one specific embodiment thereof.

I claim:

1. In a telephone receiver shell, the combination of a body portion folded over at i an edge, threads on said folded part and the body portion for securingthem together, a

. cap, and means to attach said cap to said vbody at said folded edge.

2. In a telephone receiver shell, 2. body portion, a cap portion, one-of said portions having its edge folded over and secured to said portion at the contacting surfaces, and thread fastening means supported by said foldin portion. whereby sald cap is secured to sai body portion. I

3. In a telephone receiver shell, a body portion having its edge folded over and'secured to the main (part at the contacting sur-.

faces of the folde part and the body part, threads cut in said body portion at the folds, said threads extending through the folded art into the main part, a ca having a olded edge, threads cutln sai cap at the folded edge adapted to cooperate with the ingsubstantially parallel with the main por cut tion and secured thereto, threads through the folded portion into the main portion and a threaded cap engaging the threads to secure said cap and body portion together.

6. In a telephone receiver shell, a body portion having an edge folded over against the body portion and secured thereto threads cut through the folded part into the main portion and a threaded cap adapted to engage the threads on the main portion to secure the cap and the shell together.

' In testimony whereof I al-Hx in presence of two witnesses FRANCIS o. RIGHEY. Witnesses:

' T. M. LIBBY,

L. E. H MILTON.

my signature 

